I live in the UK and I have an elderly relative that needs new Wi-Fi gear due to poor signal. I was looking at buying her a second-hand Amplifi HD system with one router and two mesh nodes for £100 (around $120 for the kind 'muricans). Would you recommend that, or something else?

She has a few smart home devices and cameras, and streams TV through her non-wired Apple TV, but other than that she’s a fairly light user and lives by herself. Thanks in advance for your advice. 🙏🏻